西安羚羊网络技术文档
1.过滤不安全的字符串
///
/// 过滤不安全的字符串
///
///
///
public static string FilteSQLStr( string Str)
{
Str = Str.Replace( " ' " , "" );
Str = Str.Replace( " /" " , "" );
Str = Str.Replace( " & " , " & " );
Str = Str.Replace( " < " , " < " );
Str = Str.Replace( " > " , " > " );
Str = Str.Replace( " delete " , "" );
Str = Str.Replace( " update " , "" );
Str = Str.Replace( " insert " , "" );
return Str;
}
2.过滤 Sql 语句字符串中的注入脚本
///
/// 过滤 Sql 语句字符串中的注入脚本
///
/// 传入的字符串
///
public static string SqlFilter( string source)
{
// 单引号替换成两个单引号
source = source.Replace( " ' " , " '' " );
// 半角封号替换为全角封号,防止多语句执行
source = source.Replace( " ; " , " ; " );
// 半角括号替换为全角括号
source = source.Replace( " ( " , " ( " );
source = source.Replace( " ) " , " ) " );
/// 要用正则表达式替换,防止字母大小写得情况 // //
// 去除执行存储过程的命令关键字
source = source.Replace( " Exec " , "" );
source = source.Replace( " Execute " , "" );
// 去除系统存储过程或扩展存储过程关键字
source = source.Replace( " xp_ " , " x p_ " );
source = source.Replace( " sp_ " , " s p_ " );
// 防止16进制注入
source = source.Replace( " 0x " , " 0 x " );
return source;
}
2.过滤 Sql 字符
/// 过滤SQL字符。
///
/// 要过滤SQL字符的字符串。
///
public static string ReplaceSQLChar( string str)
{
if (str == String.Empty) return String.Empty;
str = str.Replace( " ' " , " ‘ " );
str = str.Replace( " ; " , " ; " );
str = str.Replace( " , " , " , " );
str = str.Replace( " ? " , " ? " );
str = str.Replace( " < " , " < " );
str = str.Replace( " > " , " > " );
str = str.Replace( " ( " , " ( " );
str = str.Replace( " ) " , " ) " );
str = str.Replace( " @ " , " @ " );
str = str.Replace( " = " , " = " );
str = str.Replace( " + " , " + " );
str = str.Replace( " * " , " * " );
str = str.Replace( " & " , " & " );
str = str.Replace( " # " , " # " );
str = str.Replace( " % " , " % " );
str = str.Replace( " $ " , " ¥ " );
return str;
}
4.
过滤标记
///
/// 过滤标记
///
/// 包括HTML,脚本,数据库关键字,特殊字符的源码
///
已经去除标记后的文字
public string NoHtml( string Htmlstring)
{
if (Htmlstring == null )
{
return "" ;
}
else
{
// 删除脚本
Htmlstring = Regex.Replace(Htmlstring, @" " , "" , RegexOptions.IgnoreCase);
// 删除HTML
Htmlstring = Regex.Replace(Htmlstring, @" <(.[^>]*)> " , "" , RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @" ([/r/n])[/s]+ " , "" , RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @" --> " , "" , RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"